Septsilk was an expensive cloth used to make fine clothing. Uta S'orn and Sei Taria were known for their fondness of wearing septsilk clothing, as were the infamous Confederacy of Independent Systems scientists Ovolot Qail Uthan and Jenna Zan Arbor.
- Star Wars: The Old Republic
- Jedi Apprentice: The Deadly Hunter
- Jedi Apprentice: The Evil Experiment (Mentioned only)
- Star Wars: Darth Plagueis
- Cloak of Deception
- Star Wars Episode I: The Phantom Menace (First appearance)
- Jedi Quest: The Way of the Apprentice
- Jedi Quest: The School of Fear
- Jedi Quest: The Moment of Truth
- Jedi Quest: The Changing of the Guard
- The Last of the Jedi: Reckoning (Mentioned only)
- Episode I: The Visual Dictionary (First identified as Septsilk)
- The Emperor's Pawns"—Star Wars Gamer 5 "
- Galactic Campaign Guide